[INFRA-421] support repos with no launch.yaml

[dmartschenko]

Clever Coding Standards Agreement

• Author and Review Statement, "We agree this code adheres to our Clever Global Coding Standards and other applicable Coding Standards"

JIRA

https://clever.atlassian.net/browse/INFRANG-????

About

goci previously only built apps configured via Catapult launch configs. This PR adds support for apps configured for Kubernetes via stack.yaml, and handles repos with a mix of both.

In this PR:

• Discovers and builds apps from both config/ (Kubernetes) and launch/ (Catapult), merging results with Kubernetes winning when the same app appears in both
• Kubernetes apps skip the Catapult publish and deploy steps
• Fails when a Kubernetes config exists for an app but is missing a build command that the legacy Catapult config had — forces migration to be completed explicitly
  • Will work on this ticket first to prevent hard blockers: https://linear.app/clever/issue/INFRA-420/move-kubernetes-migrated-apps-to-new-launch-gen-version
• Only errors if both config directories are missing; a missing config/ or launch/ alone is silently ignored

Important

This PR proposes adding a build block to the stack.yaml files for kubernetes apps. It would be configured as such

build:
  command: make build
  dockerfile: Dockerfile
  artifactName: my-app
  dependencies:
    - src/**
    - go.mod

Checklist

• Increment the version number in VERSION
• Add release notes

Testing

• Removed launch.yaml, migrated to new launch-gen, and verified cci builds for slingshot
• Verified cci builds for groups which has catapult + kubernetes apps